4. She has been working _______ for three months, because she needs to take a potentially life-changing exam in March.
(A) haphazardly
(B) angrily
(C) carelessly
(D) diligently
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統計: A(0), B(0), C(0), D(1), E(0) #3754702
統計: A(0), B(0), C(0), D(1), E(0) #3754702